Slides from my demonstration titled "Take Control of your Integration Testing with TestContainers". Demonstrates using TestContainers for RDBMS and test driving S3 API with localstack.

1. Take Control of your
Integration Testing with
TestContainers
Naresha K
@naresha_k
https://blog.nareshak.com/

2. About me
Developer, Architect &
Tech Excellence Coach
Founder & Organiser
Bangalore Groovy User
Group

3. Integration Testing?

5. Story #1

6. @Transactional
class ConferenceService {
def getConferencesInCities(List<String> cities) {
Conference.where {
city in cities
}.list()
}
}

7. select
this_.id as id1_0_0_,
this_.version as version2_0_0_,
this_.name as name3_0_0_,
this_.city as city4_0_0_
from conference this_
where this_.city in ()

8. hibernate:
cache:
queries: false
use_second_level_cache: false
use_query_cache: false
dataSource:
pooled: true
jmxExport: true
driverClassName: org.h2.Driver
username: sa
password: ''
logSql: true
environments:
development:
dataSource:
dbCreate: create-drop
url: jdbc:h2:mem:devDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE
test:
dataSource:
dbCreate: update
url: jdbc:h2:mem:testDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE
Application.yml (Test with H2)

10. dataSource:
pooled: true
jmxExport: true
driverClassName: com.mysql.jdbc.Driver
username: root
password: secret
logSql: true
environments:
development:
dataSource:
dbCreate: create-drop
url: jdbc:h2:mem:devDb;MVCC=TRUE;LOCK_TIMEOUT=10000;DB_CLOSE_ON_EXIT=FALSE
test:
dataSource:
dbCreate: update
url: jdbc:mysql://localhost:3306/testapp
Application.yml (Test with MySQL)

12. testCompile platform('org.testcontainers:testcontainers-bom:1.12.5')
testCompile 'org.testcontainers:spock'
testCompile 'org.testcontainers:mysql'
build.gradle

13. dataSource:
pooled: true
jmxExport: true
driverClassName: org.testcontainers.jdbc.ContainerDatabaseDriver
logSql: true
environments:
test:
dataSource:
dbCreate: update
url: jdbc:tc:mysql:8://somehostname:someport/databasename
Application.yml (Test with TestContainers)

14. @Integration
@Rollback
@Testcontainers
class ConferenceTestContainerSpec extends Specification {
@Shared
MySQLContainer mySQLContainer = new MySQLContainer()
.withDatabaseName("testapp")
.withUsername("user")
.withPassword("secret")
ConferenceService conferenceService
void "should return empty list"() {
// test code
}
}

16. @Integration
@Rollback
@Testcontainers
class ConferenceTestContainerSpec extends Specification {
@Shared
MySQLContainer mySQLContainer = new MySQLContainer()
.withDatabaseName("testapp")
.withUsername("user")
.withPassword("secret")
ConferenceService conferenceService
void "should return empty list"() {
// test code
}
}
dataSource:
driverClassName: org.testcontainers.jdbc.ContainerDatabaseDriver
environments:
test:
dataSource:
dbCreate: update
url: jdbc:tc:mysql:8://somehostname:someport/databasename

17. Story #2

18. testCompile platform('org.testcontainers:testcontainers-bom:1.12.5')
testCompile 'org.testcontainers:spock'
testCompile 'org.testcontainers:mysql'
testCompile "org.testcontainers:localstack"
build.gradle

20. References
https://github.com/naresha/agileindia2020testcontainersdemo
https://www.testcontainers.org/

21. Thank You